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Lapping tools
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Patent number 5,041,173
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Issue date Aug 20, 1991
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Kabushiki Kaisha Toshiba
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Toshio Shikata
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B22 - CASTING POWDER METALLURGY
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Dual graphite structured pipe
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Patent number 4,832,084
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Issue date May 23, 1989
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United States Pipe and Foundry Company
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Andrew B. Malizio
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B22 - CASTING POWDER METALLURGY
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3773576
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Patent number 3,773,576
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Issue date Nov 20, 1973
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B44 - DECORATIVE ARTS
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2915813
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Patent number 2,915,813
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Issue date Dec 8, 1959
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E04 - BUILDING
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Patent number 2,218,076
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Issue date Oct 15, 1940
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H01 - BASIC ELECTRIC ELEMENTS
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1072661
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Issue date Sep 9, 1913
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...